UNDERMINE
cave, undermine
(verb) hollow out as if making a cave or opening; “The river was caving the banks”
sabotage, undermine, countermine, counteract, subvert, weaken
(verb) destroy property or hinder normal operations; “The Resistance sabotaged railroad operations during the war”
Source: WordNet® 3.1
Etymology
Verb
undermine (third-person singular simple present undermines, present participle undermining, simple past and past participle undermined)
To dig underneath (something), to make a passage for destructive or military purposes; to sap. [from 14th c.]
(figuratively) To weaken or work against; to hinder, sabotage. [from 15th c.]
To erode the base or foundation of something, e.g. by the action of water.
Antonyms
• undergird
Source: Wiktionary
Un`der*mine", v. t.
1. To excavate the earth beneath, or the part of, especially for the
purpose of causing to fall or be overthrown; to form a mine under; to
sap; as, to undermine a wall.
A vast rock undermined from one end to the other, and a highway
running through it. Addison.
2. Fig.: To remove the foundation or support of by clandestine means;
to ruin in an underhand way; as, to undermine reputation; to
undermine the constitution of the state.
He should be warned who are like to undermine him. Locke.
Source: Webster’s Unabridged Dictionary 1913 Edition